Compared to the rest of the Metropolitan Los Angeles market, the Costa Mesa submarket has lower rates, so you should have no trouble finding a great deal in this undervalued submarket.
In the last 90 days, 72 listings have been listed, so you'll want to check back regularly for new listings. About 3% of the office spaces in the Costa Mesa are subleases, so you will probably need to consider the implications of signing a direct lease with the building. There aren't many listings below 2,000 square feet posted, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around 2,080 sqft. Most buildings in this area are around 2 floors. Most buildings in this region were built in 1983 and are Class A.